from making laws to breaking the law, why a state senator is now behind bars. what it could mean for his high profile seat that he's running for. >> i don't know if he knew he had the gun on him. >> he said he forgot about it, it was in his bag. >> well that goes around a lot, a lot of people say they forget things. i'm just totally shocked. [ female announcer ] the humana walmart-preferred rx plan p-d-p gives you a low $18.50 monthly plan premium... and select generic hypertension drugs available for only a penny... so you can focus on what really matters. call humana at 1-800-808-4003. bill: a new challenge now as states legalize marijuana for medical and recreational use. law enforcement agent size now working to develop driving limits like those you find for alcohol. pot officially becomes legal in washington state as of today, where there is already a driving limit in place. what is that limit? william la jeunesse live on that story in our west coast newsroom. william, good morning. >> reporter: bill, the purpose of course is to keep impaired drivers off t